AQUAPAPA 4x Bio Sponge Filter for Betta Fry Aquarium Fish Tank Up to 15 Gal Each

These sponge filters are great for fry aquariums and brine shrimp hatcheries because they prevent young fry from being trapped in the filter media. Operates silently, creating numerous minute bubbles for increased oxygen flow.

Sponge filter is good for aquarium and provides both mechanical and biological filtration. The air infusion chamber produces numerous minute bubbles which promote gas exchange and increase dissolved oxygen level in tank water. Simply install an airline into the unit and provide both aeration and filtration for your fish. The sponge traps larger waste particles mechanically cleaning the water without trapping baby fish. Product dimensions: 3.5” wide x 1.8” deep x 5.5” high; sponge dimensions: 1.8”D x 3.12”H. They are useful for as breeding filter or as secondary filter. Or they can be used as pre-filtration unit by fitting to an external or a top filter. Max tank size: up to 15 gallon each filter